US3396616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for perforating thermoplastic foams
Assignee: Dow Chemical Co
•
Filing: 1966-05-16
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Granted: 1968-08-13
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Donald R Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:09
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/24; B26F3/00; B26F3/06; B26F3/08; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2374706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |